/**
  * Test if the class loaders has been registered successfully.
  *
  * @return void
  */
 public function testRegisterClassLoaders()
 {
     // register the mock class loader instance
     $this->application->addClassLoader($mockClassLoader = new MockClassLoader());
     $this->application->registerClassLoaders();
     // check that the mock class loader has been registered
     $this->assertTrue($mockClassLoader->isRegistered());
 }